{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xed1f8340c599925fd4d83059caa45206232aa50f35ae9148e7f77349b495d533",
    "signature": "0x35728c9b066841b442ad3b5e4ed23a734b5acfe4e410061aafbb518ce4446d5a1152727b437ae690c80a263d19861ce91e64a41c4144a4e7771aca320522592f1b",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}